1238486979 has 12 divisors (see below), whose sum is σ = 1669148936. Its totient is φ = 816749952.

The previous prime is 1238486971. The next prime is 1238486981. The reversal of 1238486979 is 9796848321.

It is not a de Polignac number, because 1238486979 - 2³ = 1238486971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238486971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 599302 + ... + 601364.

Almost surely, 2^1238486979 is an apocalyptic number.

1238486979 is a deficient number, since it is larger than the sum of its proper divisors (430661957).

1238486979 is an frugal number, since it uses more digits than its factorization.

1238486979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226 (or 2163 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 57.

The square root of 1238486979 is about 35192.1437113456. The cubic root of 1238486979 is about 1073.8999322446.

The spelling of 1238486979 in words is "one billion, two hundred thirty-eight million, four hundred eighty-six thousand, nine hundred seventy-nine".